MAINTAINERS: nx crypto: Fix typo in a filepath

Fix typo in nx_debugfs.c filepath. File extension changed from .h to .c
The file nx_debugfs.h never existed.

Cc: Breno Leitão <leitao@debian.org>
Cc: Nayna Jain <nayna@linux.ibm.com>
Cc: Paulo Flabiano Smorigo <pfsmorigo@gmail.com>
Cc: Dan Streetman <ddstreet@ieee.org>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: linux-crypto@vger.kernel.org
Signed-off-by: Denis Efremov <efremov@linux.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

MAINTAINERS

@@ -7671,7 +7671,7 @@ F:	drivers/crypto/nx/nx-aes*
 F:	drivers/crypto/nx/nx-sha*
 F:	drivers/crypto/nx/nx.*
 F:	drivers/crypto/nx/nx_csbcpb.h
-F:	drivers/crypto/nx/nx_debugfs.h
+F:	drivers/crypto/nx/nx_debugfs.c
 
 IBM Power Linux RAID adapter
 M:	Brian King <brking@us.ibm.com>